CN1292485A

CN1292485A - Combined evaporator/collector/air intake pipeline heat exchanger

Info

Publication number: CN1292485A
Application number: CN001268619A
Authority: CN
Inventors: 马克·G·沃斯; 乔纳森·P·瓦特莱; 斯蒂芬·B·梅默里
Original assignee: Modine Manufacturing Co
Current assignee: Modine Manufacturing Co
Priority date: 1999-09-07
Filing date: 2000-09-07
Publication date: 2001-04-25
Anticipated expiration: 2020-09-07
Also published as: TW448278B; JP2001091104A; MY133661A; AR025501A1; AU768858B2; CA2317372A1; CN1171053C; DE60011196D1; AU5351700A; US6185957B1; DE60011196T2; ES2220348T3; EP1083395A1; RU2271503C2; KR20010030262A; MXPA00008667A; BR0003878A; ATE268458T1; EP1083395B1

Abstract

The present invention relates to a combined evaporator and suction line heat exchanger. First pipes are provided a major dimension, a minor dimension measured transverse to the major dimension and opposed ends. The tube is formed in a serpentine configuration by bends across the minor dimension with a plurality of generally parallel, spaced runs extending between the ends. An evaporator inlet fixture is provided on one of the ends and an evaporator outlet fixture is provided on the other end. Fins extend between adjacent ones of the tubes. A second tube having a length that is a minor fraction of that of the first tube includes opposed ends, a major dimension, and a minor dimension measured transverse to the major dimension. The second tube is bonded to a corresponding side wall of the first tube at a location immediately upstream of the outlet fixture to be in good heat exchange relation therewith to define a heat exchange suction line heat exchanger integral with the evaporator.

Description

Evaporimeter/gatherer/aspirating air pipe the heat exchanger of combination

The present invention relates to heat exchanger, relate in particular to a kind of aspirating air pipe heat exchanger of combination and the evaporimeter that is used for refrigeration system.

As everyone knows, discharging the refrigerant in the atmosphere is a main cause that damages the ozone layer.And the cold-producing medium that resembles R134a one class to the influence of environment certainly than replaced cold-producing medium, for example R12 is much better, but disadvantageously they can produce greenhouse effects.

R12 and 134a are widely used for automotive field, and of greatest concern in this field be its weight and volume.If it is the heat exchanger in the motorcar air conditioner system is too heavy, then very unfavorable to the fuel-economizing of automobile.Equally, too big as fruit volume, not only weight can increase, and the design of heat exchanger can hinder the Automobile Design personnel, and realization helps fuel-economizing " smooth " design according to aerodynamics.

Well sealed the fixed system because compressor can not resemble, specifically the rotary power of its automobile engine that need transmit by belt etc. goes so the many cold-producing mediums in the motorcar air conditioner system can drain in the atmosphere.Therefore, the refrigeration system that requires to use in automotive field drains in the atmosphere the cold-producing medium that atmosphere damages without any meeting, and makes each parts of system small and light, so that can not have a negative impact to fuel-economizing.

The supercritical CO that these factors certainly will will consider may be used in the automotive field ₂System.For example, require in these systems, to be used as the CO of cold-producing medium ₂The time atmosphere is not impacted in beginning, if thereby used CO ₂System in CO is arranged ₂Drain back to atmosphere, also can not increase the CO in the atmosphere ₂Content.In addition, if from the viewpoint of greenhouse effects, CO ₂Be unfavorable, so, because less than the CO that increases because of leakage in the atmosphere ₂Content just can not increase greenhouse effects yet.

But according to the thermodynamic behaviour curve, these system requirements use aspirating air pipe formula heat exchanger to increase the refrigeration of evaporimeter.If do not use this heat exchanger, then need to make CO ₂Mass velocity quite high, correspondingly also to make the input power of compressor very high, so that satisfy the general load in the automotive air-conditioning system.Owing to used aspirating air pipe formula heat exchanger, so CO ₂Mass velocity and the input power of compressor can reduce, realize reducing the purpose of system compresses machine size as what is desired.Simultaneously, automobile increases aspirating air pipe formula heat exchanger just might gain in weight, and to occupy more in automotive engine component be very limited space.So, in fact need the very aspirating air pipe formula heat exchanger of compact efficient.

Up to now, all be that aspirating air pipe formula heat exchanger is used for bigger refrigeration system, the cold-producing medium that comes out in must be with evaporimeter in this refrigeration system is discharged in the compressor as superheated steam, does not have liquid to enter compressor so that guarantee.This is necessary when the compressor that is used for refrigeration system traditionally is the variable displacement type device.Like this, if suck compressor, all might cause heavy losses or damage to the pumpability of compressor with the simultaneous any liquid refrigerant of gaseous refrigerant in the saturation state.

Aspirating air pipe formula heat exchanger can be by will coming from system condensing device or gas cooler the condensating refrigerant of comparative heat and the cold-producing medium that goes out flash-pot between evaporimeter and compressor, carry out heat exchange and avoid above-mentioned difficulties.Therefore, the cold-producing medium stream that goes out flash-pot will obtain heating.The size of aspirating air pipe formula heat exchanger should be able to make the air-flow that evenly arrives compressor from this aspirating air pipe formula heat exchanger become superheated steam, makes the cold-producing medium saturation temperature of its temperature under this moment system pressure.So cold-producing medium is not to be in liquid phase, compressor receives only gaseous refrigerant.This system is shown among Fig. 1.

Used aspirating air pipe formula heat exchanger is generally very long concentric circles pipe unit in commercial field traditionally.They also are not suitable for very valued occasion.Other form of aspirating air pipe formula heat exchanger comprises uses the heavy caliber pipe that the evaporator outlet air-flow is introduced compressor.Be wound with small-bore pipe on this pipe with the liquid refrigerant drawing-in system bloating plant of condenser.Some changes this heat exchanger with respect to concentric circles tubular construction performance, and it can replace connecting pipe between high-pressure side condenser and the bloating plant and the connecting pipe between low-pressure side evaporimeter and the compressor, has saved the space thus slightly.But its volume is still very big, so be not suitable for the mobile refrigerating system, for example is not suitable for automotive air-conditioning system.

In order to realize compact purpose, proposed evaporimeter and aspirating air pipe formula heat exchanger are combined into an assembly.An example of this structure is described in the U.S. Pat 5678422 of Yoshii etc. (authorize day be on October 21st, 1997).Evaporation structure is covered in the stretching that is called that is proposed, and also has a stretching bonnet hot interchanger on the end of this evaporimeter, and this heat exchanger is as aspirating air pipe formula heat exchanger.Though reached certain compact degree like this, the volume of evaporimeter increased greatly owing to having increased stretching bell-type aspirating air pipe heat exchanger.

The another kind of example that aspirating air pipe heat exchanger and evaporimeter are combined has been described in the U.S. Pat 5212965 of Datta (authorize day be on May 25th, 1993).What introduce in this patent is a kind of pipe heat radiation type evaporation structure, though this structure combines aspirating air pipe heat exchanger and evaporimeter, but still the volume of structure is reduced a lot, thereby the size of this evaporation structure own is just very big.

Kritzer has described a kind of vapor compression refrigeration system that is generally used for freezing in U.S. Pat 3274797 (authorizing day is on September 27th, 1966), condenser and evaporimeter are interconnected (probably as bloating plant) with a capillary, capillary contacts with the aspirating air pipe of compressor, makes to carry out heat exchange between them.Kritzer introduces like this can change the cold-producing medium flow velocity that flows to evaporimeter according to the refrigerant temperature of compressor air suction pipeline.Therefore, be the evaporator outlet air-flow at bloating plant place and the heat exchange between the condenser inlet air-flow though the surface goes up that Kritzer relates to, its objective is that the realization air-flow controls, so be not traditional aspirating air pipe heat exchanger.

What Vakil described in U.S. Pat 4304099 (authorizing day is on December 8th, 1981) is a capillary that is connected with condensator outlet to be contacted with the outer surface of evaporimeter along its whole length realize heat exchange discharging the refrigerant in the evaporimeter then.The liquid refrigerant that Vakil is intended to self cooling condenser in future cools off, so that form steam within it before avoiding evaporating, in order to avoid thermodynamic efficiency reduces.Because Vakil does not propose the concrete shape of used evaporimeter, whether help compactedness so can not determine the design of Vakil patent at all.

Therefore can imagine,, still should realize very compact system although want aspirating air pipe heat exchanger and evaporimeter are combined.

Main purpose of the present invention is to provide a kind of new high performance aspirating air pipe heat exchanger.Specifically, the object of the present invention is to provide a kind of very evaporimeter and the aspirating air pipe heat exchanger of compact combination.One embodiment of the present of invention are to realize above-mentioned purpose with an evaporimeter and an aspirating air pipe heat exchanger that is used for the combination of refrigeration system, this heat exchanger comprises first pipe that has porous of an elongated flat, this pipe has a bigger size, reduced size with this large scale crosscut, and opposite two ends.First pipe is for spirally coiled, by forming this first pipe along the some substantially parallel pipelines at interval that have of whole small-sized disc coiled between two ends, thereby limits an evaporimeter.The access device of first pipe is positioned at one of them end of first pipe, and the outlet device of first pipe is positioned at another end of first pipe.The fin that some extensions are arranged between the adjacent channel of pipe.Second pipe that has porous of an elongated flat is provided, and the length of this second pipe is the sub-fraction of first pipe.Second pipe has opposite two ends, large-size and with the reduced size of this large-size crosscut.Second pipe is welded on the corresponding sidewall of first pipe along the sidewall that limits large-size substantially, its welding position so that good heat exchange is arranged between them, thereby limits the aspirating air pipe heat exchanger directly in the upstream of outlet device.The access device of aspirating air pipe is positioned at one of them end of second pipe, and the outlet device of aspirating air pipe is positioned at another end of this pipeline.

Utilize this structure, aspirating air pipe heat exchanger and an evaporimeter are combined into one, and like this, only increase the length of evaporimeter, and this length is corresponding to the reduced size of second pipe.Therefore the structure that obtains is very compact.

In a preferred embodiment, first pipe is soldered to the second pipe place at it and becomes the nominal right angle with pipeline, and contacts with the part of preceding two crooked positions.

The 3rd pipe that has porous of an elongated flat opposite with first tube shape is provided in a preferred embodiment.The 3rd pipe has a bigger size, the reduced size with this large scale crosscut, and opposite two ends.The 3rd pipe is spirally coiled, by form the 3rd pipe along the some substantially parallel pipelines at interval that have of whole small-sized disc coiled between two end, the fin of some extensions is arranged between each adjacent pipeline of the 3rd pipe.An end of the 3rd pipe is communicated with the first tube inlet equipment fluid, and another end of the 3rd pipe is communicated with the first pipe outlet device fluid, and limits a set composite evaporimeter with first pipe.The middle part at the second pipe two ends also is welded on the 3rd pipe, and its welding position is directly in the upstream of outlet device, so that carry out heat exchange between them.

In a preferred embodiment of the invention, the pipeline number of first pipe equals the pipeline number of the 3rd pipe.

In a more preferred embodiment, the 3rd pipe is the mirror image shape of first pipe.

In one embodiment of the invention, the aspirating air pipe outlet device is hydraulically between first tube inlet and outlet device, so that provide adverse current in the aspirating air pipe heat exchanger.

In one embodiment of the invention, have some from combination evaporimeter and a side of aspirating air pipe heat exchanger to the first stacked pipe of opposite side, correspondence one end of each first pipe is connected with the access device of first pipe, and another corresponding end of each first pipe is connected with the outlet device of first pipe.

In a preferred embodiment, second pipe is the nominal straight tube.

In one embodiment of the invention, the entrance and exit equipment of first pipe is limited by the single equipment group.

In another embodiment of the present invention, first pipe is two independent sectors.Wherein a part comprises that substantially parallel separated pipeline, another part are positioned at it and are soldered to position on second pipe.A gatherer interconnects these two parts.

In a preferred embodiment, gatherer is the pipe fitting mechanism of a vertical elongated.Preferably another part of first pipe is connected with described pipe fitting mechanism, the part that this connecting portion is in first pipe is with above the contact that pipe fitting mechanism is connected.

In one embodiment, gatherer is positioned at this two-part side.In another embodiment, a described part limits an air flow circuit by evaporimeter, and gatherer is adjacent with this part, is arranged in described air flow circuit.

In another embodiment, first pipe meets at right angles with second the pipe position and the pipeline that contact at it, and meshes with turn of bilge.Little kink or joint shape partly are arranged in first pipe, the engagement of aliging with a corresponding turn of bilge wherein.Kink separates the small bore part of first pipe with second pipe, thereby short circuit appears in the cooling effect of avoiding first pipe to produce.

Other purpose and advantage will be clearer by the description below in conjunction with accompanying drawing.

Fig. 1 is the schematic diagram of the refrigeration system with aspirating air pipe heat exchanger of prior art;

Fig. 2 is the schematic diagram with refrigeration system of aspirating air pipe heat exchanger of the present invention;

Fig. 3 is the vertical sectional view with evaporimeter that has six loops of monoblock type aspirating air pipe heat exchanger of the present invention, and it is cut open along the 3-3 line of Fig. 4;

Fig. 4 is the plane that is attached to the aspirating air pipe heat exchanger in the evaporimeter;

Fig. 5 is the profile of doing along the 5-5 line of Fig. 3;

Fig. 6 is the retrofit front view of embodiment of the present invention;

Fig. 7 is the side view of another remodeling of the present invention embodiment; With

Fig. 8 is the partial enlarged drawing of a contact point between the pipeline of formation aspirating air pipe heat exchanger and the pipeline that forms evaporimeter.

The preferred embodiment of the evaporimeter with monoblock type aspirating air pipe heat exchanger is described in conjunction with refrigeration system shown in Figure 2 now.But it should be understood that, heat exchanger of the present invention is not limited to be used in the refrigeration system, but can be used as following compact heat exchanger effectively: this compact heat exchanger with gas as a kind of and second kind of heat-exchange fluid that heat-exchange fluid carries out heat exchange, and second kind of heat-exchange fluid also can with self carry out heat exchange or carry out heat exchange with the third heat-exchange fluid.

Should also be noted that the present invention can also be used in the refrigeration system of using conventional cold-producing medium effectively, wherein vapor refrigerant obtains condensation in condenser, but also can be used in the more perfect refrigeration system, for example supercritical CO ₂System, wherein high-pressure refrigerant does not obtain condensation, but obtains cooling in a heat exchanger, and this heat exchanger is a gas cooler usually.So the speech of usefulness " gas cooler " is not only and is used to cool off supercritical CO herein ₂The heat exchanger of the gas in the system, but also be to use traditional condenser in the system of conventional cold-producing medium.

In conjunction with top consideration, refrigeration system shown in Figure 2 is described now.This refrigeration system is preferably used in automobile, because it is very compact, and also very light.But it also can be used for fixing in the system.

As shown in Figure 2, this system comprises a compressor 10, and the outlet conduit 12 of this compressor provides high pressure, high temperature refrigerant to gas cooler 14.Utilize the urgent cooling agent of the known blower fan Final 16 by gas cooler 14.Therefore, condensation or the high-pressure refrigerant that obviously cooled off leave gas cooler 14 in pipeline 18, cold-producing medium is by this pipeline inflow heat exchanger 20, and this heat exchanger and conventional evaporator 22 are carried out heat exchange, and specifically its outlet side and evaporimeter 22 carry out heat exchange.Drive or aspirate the air that needs through evaporimeter 22 coolings with a blower fan 24.The some of them air also flows through heat exchanger 20.

Heat exchanger 20 is discharged into the temperature of high-pressure refrigerant of bloating plant 26 still than higher, and this bloating plant discharges the refrigerant to evaporimeter 22.The cold-producing medium of the expansion in evaporimeter absorbs evaporation latent heat (under the situation of vapor refrigerant).Evaporimeter only absorbs latent heat.Evaporimeter 22 heating enter the cold-producing medium in the aspirating air pipe heat exchanger 20 then, and discharge the refrigerant to the inlet of compressor 10.

Get back to Fig. 3 now, describe the evaporimeter and the aspirating air pipe heat exchanger 20,22 of combination in detail.Evaporimeter comprises an access device 30, and this access device preferably is welded on the outlet device 32, and they are become one.Access device 30 links to each other with bloating plant 26 usually, and outlet device 32 links to each other with the inlet of compressor 10 usually.

Two long

flat tubes

34,36 are provided, and their

inlets

38 and 40 separately link to each other with access device 30.Pipe 34,36 ports of export 42,44 that are communicated with outlet device 32 fluids in addition.

To bend to spirally coiled at the pipe between the

end

38,42 34, and make it have some substantially parallel pipelines 46 that connect by turn of bilge 48.These pipelines 46 are separated from each other of a certain distance, and coil pipe fin 50 extends between each adjacent channel 46.

Label is that 52 pipeline is an outlet conduit, and its side is a side plate 54, and side plate leans against another coiling fin 50 folders on the outlet conduit 52.In the top, 56 places curve about 90 degree to outlet conduit 52 at the position, extend towards outlet device 32, and the end of pipe 34 is communicated with its fluid.This part of pipe 34 represents that it contacts with the turn of bilge 48 of adjacent vaporizer side with 58, and just in time in the upstream of outlet device 32.

34 one-tenth image shapes of pipe 36 and pipe, it has side plate 54 and the exit portion 58 that is transverse to pipeline 46 etc.In fact, pipe 36 can be made and manage 34 identical shapes, just will turn to 180 degree.

Because it is identical managing 34 and 36, so in illustrated embodiment, the quantity of each

pipe

34,36 pipeline 46 each other is identical.But, should be understood that if necessary, the some pipeline numbers in the

pipe

34,36 can be more than another.

As mentioned above,, after the bloating plant 26 for example shown in Figure 2, there is cold-producing medium to be evaporated obviously can enter access device 30,, finally discharges at outlet device 32 so that flow through

pipe

34,36 by bloating plant.

In order to obtain the efficient of aspirating air pipe heat exchanger, utilize the metal welding connection, for example a more straight slender pipeline 70 is welded on the outlet section 58 of

pipe

34 and 36 with soldering or brazing method.Have access device 76 and outlet device 78 on the

end

72,74 of pipe 70.As shown in Figure 2, access device 76 is connected with the outlet of gas cooler 14, and outlet device 78 is connected with inlet with bloating plant 26.Therefore utilize this structure, the high-pressure refrigerant of comparative heat flows into outlet device 78 by pipe 70 from access device 76.It and low-pressure low-temperature cold-producing medium carry out heat exchange, so cold-producing medium will be discharged evaporimeter 22 from outlet device 32.So low pressure refrigerant will obtain heating, makes the air-flow of discharge overheated.

As shown in Figure 4, can be stacked with some tubulations 34,36.So

upstream tube row

34,36 notes are made A, and downstream tube row note are made B.Intervalve row note is made C.It should be noted that the size of each tubulation is not necessarily identical.Specifically, may not be always like this, for A, each pipe row of B and C pipe row all have a pipe 70.

As mentioned above, the most handy flat tube that is called porous type.This pipe extruding forms, and also some plug-in units can be set in pipe, makes to be divided into some passages in the pipe.Each passage can not be communicated with, and can be communicated with by fluid yet.As shown in Figure 5, in the pipe 70 some passages 80 that separate with thin slice 82 are arranged, thin slice can push and form, and also can be single welding plug-in unit.In the

pipe

34,36 some passages 84 that separate with thin slice 86 are arranged, its preparation method is similar with pipe 70.Pipe 34,36 and 70 all is flat tubes, that is to say that each Guan Jun has bigger dimension D _MBe transverse to this large-size D _MReduced size d _mBecause the contact-making surface of pipe 90 is flat (Fig. 5), thus just can realize welding closely by brazing or soldering, thus guarantee to have good heat exchange contact between pipe 70 and the

pipe

34,36.

In another embodiment shown in Figure 6, this heat exchanger comprises an access device 100, and this access device is used for being connected with bloating plant shown in Figure 2 26.Access device 100 is connected on the pipe 102 that is formed by two parts.First represents that with label 103 it comprises an antipriming pipe that is made of some straight parallelpipeds 104, and described parallelpiped interconnects by turn of bilge 106.The end of the first 103 of pipe 102 is connected with pipe 108, makes them carry out fluid and is communicated with, and pipe 108 reaches in the tubular collecting mechanism 110 of a perpendicular positioning.The end of gatherer 110 is airtight, and its cross section is circular or oval.Pipe 108 and tubular mechanism 110 outlet conduit 112 tightly below fluid be communicated with.Pipe 108 and 112 all is connected to the upper end of tubular mechanism 110.

Outlet conduit 112 is connected with the second portion 114 of pipe 102, and the pipeline 104 of the first 103 of this second portion and pipe 102 becomes the nominal right angle or less than the right angle, sides that have access device 100 towards pipe 102 are extended, and arrive outlet device 116.Outlet device 116 is connected with the inlet of compressor 10 shown in Figure 2.In some cases, conventional collector can be assigned between outlet device 116 and the compressor 10.

Second antipriming pipe 120 manages 114 along its whole length near second, and is welded on this second pipe, and this is identical with top described method.Second pipe 120 is as the aspirating air pipe heat exchanger, and for this reason, it comprises one first access device 122 and an outlet device 124 that faces toward with this first access device.The aspirating air pipe heat exchanger that limits thus is connected in the refrigerating circuit shown in Figure 2.

Therefore clearly, in the aspirating air pipe heat exchanger and evaporimeter of the combination that provides, leave evaporimeter cold-producing medium flow direction with opposite by the flow direction of managing the cold-producing medium in the 120 aspirating air pipe heat exchangers that limit.In this embodiment, tubular mechanism 110 is as gatherer.In general, in steady-state operation, there is not liquid refrigerant to leave evaporimeter by the second portion 114 of first pipe 102, in service in unstable state, for example during bringing into operation, if the gatherer that does not have tubular mechanism 110 to limit, when cold-producing medium would flow out outlet 116, the cold-producing medium that comes out can fully not heated by the warm refrigerant in the aspirating air pipe heat exchanger of pipe 120 qualifications, so that all become steam.But in the embodiment shown in fig. 6, obviously all cold-producing mediums that leave the evaporator section that is limited by pipe 102 first can enter gatherer 110.Liquid refrigerant is collected in the bottom, has only gas refrigerant to leave outlet conduit 112, by the pipe 120 aspirating air pipe heat exchanger heats that limit.

Should also be noted that in this embodiment the first of pipe 102 has determined the air flow circuit by evaporimeter.In this specific embodiment, the first of gatherer next-door neighbour pipe 102 is so that be in the air flow circuit it.So in this sense, at run duration liquid refrigerant is collected in the gatherer 110, the air by this gatherer can cause some refrigerant heats evaporations wherein.

That shown in Figure 7 is another embodiment.Embodiment shown in Figure 7 and embodiment shown in Figure 6 are similar, and difference is that the embodiment of Fig. 7 is the set composite evaporimeter, and gatherer is in a side of evaporimeter.Because structure is similar, so identical parts are represented with identical label.

As shown in Figure 7, the first of pipe 102 replaces with two parts 130 and 132, and these two parts are the parallel spirally coiled of fluid power.Two pipe portions 130 and 132 are connected to access device 100 and as the equipment 134 of the inlet of tubular gatherer 136, tubular gatherer 136 can be identical with tubular piece 110 or be equal to.But in this case, gatherer 136 is in a side of pipe portion 130 and 132.Pipe portion 130 comprises the parallelpiped 136 that some are coupled together by turn of bilge 138, and pipe portion 132 comprises the parallel straight tube 140 that some are coupled together by turn of bilge 142.Therefore, pipe portion 130 and 132 is intertwined in the coil pipe mode, and what adopt usually is coiling fin 144.

In this embodiment, the second pipe portion 114 is by being connected with gatherer 136 near equipment 150 gatherer 136 tops and that be positioned at equipment 134 tops.Its operation is basic identical with embodiment shown in Figure 6.Embodiment shown in Figure 7 is used for having the system of pressure drop.Because the loop of the embodiment of Fig. 7 is the twice in the loop of Fig. 6 embodiment, so all are half by the mass flow in each loop, the corresponding pressure loss has also just reduced.

In some cases, no matter in which embodiment, may on the evaporator section of the aspirating air pipe heat exchanger of combination and the heat-transfer path between the evaporimeter short circuit appear.That is to say, in some cases, because pipe 70 or manage the 120 aspirating air pipe heat exchanger heats that limit and can not pass in the evaporimeter, so the cold that requires to flow through the system evaporator part does not reduce.Therefore, can adopt structure shown in Figure 8 if necessary.Though should be noted in the discussion above that in conjunction with Fig. 6 especially and describe Fig. 8, if necessary, the structure of Fig. 8 preferably can be used in all embodiments.

Specifically, at the position that the second pipe portion 114 contacts with each turn of bilge 106, this pipe portion has a shallow U-shaped kink 152.Particularly to will twist together and 152 be welded on each joint 106 by soldering.Kink 152 is at second pipe 114 and limit and produce gap 154 between the pipe 120 of aspirating air pipe heat exchanger, in pipe 120 and pipe portion 102 hithermost places because pipe 114 is arranged, so can stop heat to be sent to the pipe portion 102 from managing 120.Therefore, effectively heat transfer area is less, prevents that heat mobile warm refrigerant from the aspirating air pipe heat exchanger is sent in the cold-producing medium that is evaporating in the evaporator section of combined system thereby produce very big resistance.

Any feature that should be noted in the discussion above that each embodiment of the present invention especially can be exchanged usually, and described concrete structure is used for certain embodiment, but this is not meant and is confined to this embodiment.Otherwise, should be understood that the soldering of antipriming pipe, the use of gatherer, the use of kink, use of multiple row pipeline or the like can be used among each embodiment easily.

In sum, the evaporimeter of combination manufactured according to the present invention and aspirating air pipe heat exchanger obviously are very compact.In fact, the shared zones of evaporimeter 22 just increase a bit, increase only be the reduced size d of pipe 70 _m, it is regional unimportant that the entrance and

exit equipment

76 and 78 of pipe 70 occupies.Though what the present invention described is two loops, if desired, also can be single loop apparatus.In this case, require to save pipe 36, so just can guarantee to manage the reverse flow in 70, guarantee to manage 34 exit portion 58 and reach maximum heat exchange efficiency.As long as change the columns A of heat exchanger, B, C just can improve or reduce heat-exchange capacity as required, and does not need to change the front face area of whole heat exchanger.

Claims

1. an evaporimeter and aspirating air pipe heat exchanger that is used for the combination of air-conditioning and refrigeration system, this heat exchanger:

First pipe that has porous that comprises an elongated flat, this pipe has a bigger size, reduced size with this large scale crosscut, and opposite two ends, described first pipe is spirally coiled, by between two ends, substantially parallel have pipelines at interval and form this first pipe, thereby limit an evaporimeter along whole small-sized disc coiled is some;

A first tube inlet equipment (fixture) that is positioned at described one of them end;

A first pipe outlet device that is positioned at described another end;

The fin that some extend between described adjacent channel;

Second pipe that has porous of an elongated flat, the length of this second pipe is the sub-fraction of first pipe, second pipe has opposite two ends, large-size and with the reduced size of this large-size crosscut, along the sidewall that limits large-size substantially second pipe is welded (bonded to) to the corresponding sidewall of first pipe, its welding position so that good heat exchange is arranged between them, thereby limits the aspirating air pipe heat exchanger directly in the upstream of outlet device;

An aspirating air pipe access device that is positioned at one of them end of described second pipe; With

An aspirating air pipe outlet device that is positioned at another end of described second pipeline.

2. the evaporimeter of combination according to claim 1 and aspirating air pipe heat exchanger wherein become the nominal right angle at described locational first pipe with described pipeline, and contact with more described turn of bilges.

3. the evaporimeter of combination according to claim 2 and aspirating air pipe heat exchanger, it also comprises the 3rd pipe that has porous of an elongated flat opposite with first tube shape, this pipe has a bigger size, reduced size with this large scale crosscut, and opposite two ends, the 3rd pipe is spirally coiled, by between two end, forming the 3rd pipe along the some substantially parallel pipelines at interval that have of whole small-sized disc coiled, the fin that some extensions are arranged between the adjacent pipeline of the 3rd pipe, an end of the 3rd pipe is communicated with the first tube inlet equipment fluid, another end of the 3rd pipe is communicated with the first pipe outlet device fluid, and limit a set composite evaporimeter with first pipe, the middle part at the second pipe two ends also is welded on the 3rd pipe, its welding position is near the upstream of the first pipe outlet device, so that carry out heat exchange between them.

4. the evaporimeter of combination according to claim 3 and aspirating air pipe heat exchanger, wherein the 3rd pipe is the mirror image shape of first pipe.

5. the evaporimeter of combination according to claim 3 and aspirating air pipe heat exchanger, wherein the pipeline number of first pipe equals the pipeline number of the 3rd pipe.

6. the evaporimeter of combination according to claim 1 and aspirating air pipe heat exchanger, wherein the aspirating air pipe outlet device is hydraulically between first tube inlet and outlet device, so that provide adverse current in the aspirating air pipe heat exchanger.

7. the evaporimeter of combination according to claim 1 and aspirating air pipe heat exchanger, wherein have some from combination evaporimeter and a side of aspirating air pipe heat exchanger to the first stacked pipe of opposite side, correspondence one end of each first pipe is connected with the access device of first pipe, and another corresponding end of each first pipe is connected with the outlet device of first pipe.

8. the evaporimeter of combination according to claim 1 and aspirating air pipe heat exchanger, wherein second pipe is the nominal straight tube.

9. the evaporimeter of combination according to claim 1 and aspirating air pipe heat exchanger, wherein the entrance and exit equipment of first pipe limits a single equipment group.

10. the evaporimeter of combination according to claim 1 and aspirating air pipe heat exchanger, wherein first pipe is two independent sectors, wherein a part comprises substantially parallel separated pipeline and at another part of described position; And a gatherer interconnects these two parts.

11. the evaporimeter of combination according to claim 10 and aspirating air pipe heat exchanger, wherein gatherer is the pipe fitting mechanism of a vertical elongated.

12. the evaporimeter of combination according to claim 11 and aspirating air pipe heat exchanger wherein are connected another part of first pipe with described pipe fitting mechanism, the described part that this connecting portion is in first pipe is with above the contact that fitting structure is connected.

13. the evaporimeter of combination according to claim 10 and aspirating air pipe heat exchanger, wherein gatherer is positioned at this two-part side.

14. the evaporimeter of combination according to claim 10 and aspirating air pipe heat exchanger, a wherein said part limit an air flow circuit by evaporimeter, gatherer is adjacent with this part in described air flow circuit.

15. the evaporimeter of combination according to claim 10 and aspirating air pipe heat exchanger wherein have the part of two described pipes, they coil mutually, thereby limit a set composite evaporimeter.

16. the evaporimeter of combination according to claim 1 and aspirating air pipe heat exchanger, wherein first pipe in described position meets at right angles with described pipeline, and meshes with turn of bilge; In first pipe of described position, little kink is arranged, the little kink engagement of aliging with corresponding turn of bilge wherein, described kink and second is managed and is separated.

17. the double loop evaporimeter with monoblock type aspirating air pipe heat exchanger, this evaporimeter comprises:

The pipe that has porous of a pair of elongated flat, each Guan Jun has opposite two ends, they form spirally coiled, thereby limit chipware with some parallelpipeds that separate, one end of described each pipe surge near as the corresponding inlet duct of arrival end, the other end of each pipe is the port of export, and that part of the upstream that just in time is positioned at the described port of export of each pipe extends to the position on the opposite side adjacent with described inlet duct of this correspondence chipware according to the direction that roughly is transverse to its pipeline along a lateral root of corresponding chipware;

Described each chipware is adapted to the other side location each other, thereby makes described inlet duct adjacent one another are, and the each several part of described upstream is in alignment with each other;

An access device that is connected with described each arrival end;

An outlet device that is connected with described each port of export; With

The auxiliary tube that has porous of an elongated flat, this pipe extends along described upstream portion, makes to become heat exchange relationship between them.

18. the double loop evaporimeter with monoblock type aspirating air pipe heat exchanger according to claim 16, wherein said auxiliary tube is a nominal straight tube, this pipe is connected to described upstream portion, described upstream portion is between the opposite end of this pipe, at an end of described auxiliary tube an inlet connector is arranged, an outlet connector is arranged at the other end of described auxiliary tube.

19. the double loop evaporimeter with monoblock type aspirating air pipe heat exchanger according to claim 16, it further is included in the fin that extends between each adjacent channel of described pipeline.

20. the double loop evaporimeter with monoblock type aspirating air pipe heat exchanger according to claim 16, a wherein said end pipe is mutually the same, is adapted to the other side location each other, thereby makes the mirror image shape of a pipe wherein such as another root pipe.